NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(5) [September 2010] >


Title: Equilibrium and kinetic studies for Cd(II) adsorption from aqueous solution on Terminalia catappa Linn leaf powder biosorbent
Authors: Rao, K S
Keywords: Terminalia catappa Linn leaf powder
Cadmium(II)
Adsorption
Kinetics
Isotherms
Issue Date: Sep-2010
Publisher: NISCAIR-CSIR, India
Abstract: Terminalia catappa Linn,(TCL) leaf (almond leaf) powder was tested as a biosorbent in a batch adsorption system. The samples with and without Cd(II) adsorption were characterized using FTIR and SEM-EPMA techniques. Loading of Cd(II) onto to TCL powder resulted in shift of various band positions (5 to 51 cm-1) in the FTIR spectrum. The EPMA of Cd(II) loaded powder showed that Cd(II) was not uniformly distributed on the surface but only on  specific sites. The experimental parameters chosen for adsorption studies were: pH (2.0 to 6.0), contact time (5 to 120 min), adsorbate concentration (50 to 500 mg L-1), adsorbent concentration (0.25 to 5.0 g per 50 mL adsorbate), anions and Pb(II) concentration. With the increase in pH from 2.0 to 4.0, Cd(II) adsorption increased from 0.86 to 13.79 mg g-1 and with the further increase in pH to 5.5 only marginal increase to 14.12 mg g-1 was observed. Presence of chloride, sulphate or Pb(II) adversely affected Cd(II) adsorption onto TCL. The kinetics of adsorption could be best described by the pseudo-second-order equation. The three equilibrium models namely, Langmuir, Freundlich and Redlich-Peterson fitted well to the isothermic experimental data for TCL with regression coefficients of > 0.97. The maximum uptake capacity of the biosorbent was estimated to be 35.83 mg g-1.
Page(s): 329-336
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.17(5) [September 2010]

Files in This Item:

File Description SizeFormat
IJCT 17(5) 329-336.pdf818.55 kBAdobe PDFView/Open
 Current Page Visits: 641 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 574994 since 06-Feb-2009  Last updated on 26-Aug-2014Webmaster: nopr@niscair.res.in